Food Webs and Food Chains LNE

An organism that breaks down dead plants and animals, returning matter back into the soil, is called a

• herbivore
• consumer
• producer
• decomposer

How are consumers generally classified?

• by the amount of food they eat
• by the size of their tracks
• by the way they digest their food
• by the type of food they eat

In a forest ecosystem, which has the most direct access to the main energy source?

• producer
• consumer
• decomposer
• scavenger

Which best explains how decomposers benefit an ecosystem?

• They increase dead organisms within the food chain.
• They create food for producers within the food chain.
• They break down dead organisms within the food chain.
• They supply consumers with food within the food chain.

A crow eats the remains of a dead animal. What type of consumer does this prove the crow to be?

• a decomposer
• a producer
• a herbivore
• a scavenger

Which describes a consumer in a pond ecosystem?

• cattail
• catfish
• water lily
• bacteria

Which best describes the role of both mushrooms and worms in an ecosystem?

• They provide food for carnivores.
• They provide food for herbivores.
• They provide nutrients for the soil.
• They provide nutrients during photosynthesis.

Which organism would be eaten last in a food chain?

• producer
• decomposer
• first level consumer (primary)
• second level consumer (secondary)

Which could be a secondary consumer?

• bear
• oak tree
• snail
• slug

Where do decomposers work the fastest to recycle organic material?  THINK!

• in the desert
• in the tundra
• in the rainforest
• in the mountains